294 4-bit Multiplier
294 : 4-bit Multiplier
- Author: Sarp Sevil
- Description: A 4x4 array multiplier that multiplies two 4-bit numbers to produce an 8-bit product.
- GitHub repository
- Clock: 0 Hz
How it works
Above is a diagram that represents a 4-bit multiplier, which takes in two 4-bit integers and outputs a single 8-bit integer.
This was created using a manual structural design. We utilized a 1-bit full adder module in our implementation.
- AND-Gates are utilized to multiply each bit of input
mwith each bit of inputq. - We align partial products diagonally to mimic that of manual binary multiplication.
- We use 1-bit Full Adders to add products and handle carries.
- The outputs of the Full Adders eventually went to the bits of our output
pwhich is an 8-bit integer.
How to test
Creating your own test cases:
- Go to the
testfolder and locatetest.py. - Edit
test.pyand add your own custom test cases.
# Example
# TEST CASE #0 -> 0 * 1
dut.ui_in.value = 0b00000001
await ClockCycles(dut.clk, 1)
assert dut.uo_out.value = 0b00000000
- Run the test with
makeand check the tests passed.
- If you've forked the repository
- Commit and push your changes to your forked repository
- Check Github Actions to check if your tests have passed
External hardware
N/A
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | m[0] | p[0] | |
| 1 | m[1] | p[1] | |
| 2 | m[2] | p[2] | |
| 3 | m[3] | p[3] | |
| 4 | q[0] | p[4] | |
| 5 | q[1] | p[5] | |
| 6 | q[2] | p[6] | |
| 7 | q[3] | p[7] |